Help me build my 360!

i have an originally externally balanced 340 (72-73) that i had converted to internally balanced because it was easier. It only cost me 200 to have it balanced internally. I was having a heck of a time finding a flywheel that would have kept it externally balanced because it was only a 1.5-2 yr production flywheel.
It also depends on the Bob weight. The weight of all the components mine was really light so he only had to take out metal from the front and back of the crank.